Homework Help: Adv. Math

Posted by Kenya on Thursday, February 19, 2009 at 9:15pm.

In January, gasoline cost $1.05 per gallon. In July, gasoline cost $1.20 per gallon. Find the percent of increase.

Would the answer for this question be 14.3?

And how do you do percent of decrease?
_______________________________________

The original cost of a computer is $900. If the price is decreased by 15%, what is the sale price?

I need help with this question(:
Thank you

Adv. Math - bobpursley, Thursday, February 19, 2009 at 9:18pm
percent (increase or decrease) is

Percent= (final-initial)/initial * 100

fifteen percent of 900 is 130 dollars.
so the cost is 900-130 dollars

price=(100-percentdecrease)/100 * 900
Adv. Math - Chopsticks, Thursday, February 19, 2009 at 9:20pm
bob, this looks kind of like exponential growth and exponential decay, is it? I was just wondering since we just started on exponential decay today.

Answer this Question

Related Questions

Adv. Math - Can someone else explain it but more easier for an 8th grader ...
statistics - In 1995, the cost of unleaded gasoline was $.95 per gallon. In 2010...
Math - How much would it cost to drive an automobile that averages 22 miles per ...
Math - If the price of gasoline in Germany is about $1 per liter, what is the ...
Math - How would you do this problem? At the beginning of the year, the price of...
Managerial Economics - The coefficient of the price of gasoline in the ...
College Algebra - Maria Mixed grades of gasoline in her car, she puts 10 gallon ...
math - vehicle a averges 14 miles per gallon of gasoline and vehicle b averges ...
Math - Vehicle A averages 14 miles per gallon of gasoline, and Vehicle B ...
math - You drive 15 miles each way to go to work. Your car gets 18 miles per ...

For Further Reading

First Name:
School Subject:
Answer: